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Unanswered: ExtJS4 grid autoresize columns according the content

Unanswered: ExtJS4 grid autoresize columns according the content

Hi,
How can I in the ExtJS4 Grid autoresize the width of the columns according the content size? The width of the column should be the width of the longest content in that column just like it is in an HTML table. Basically I want that HTML table auto-width behavior.
Thanks